Chapter # 16 Environmental chemistry MCQs
1. Peeling of ozone umbrella is
due to
a)
CFCs b) PAN
c)
CO2 d) Coal burning
2. DDT is
a)
Biodegradable polulutant
b)
Nondegradable pollutant
c)
Not a pollutant
d)
An antibiotic
3. Increasing skin cancer and
high mutation rates are
a)
Acid rain b)
Ozone depletion
c)
CO pollution d) CO2 pollution
4. Sewage water is purified
by
a)
Microorganisms b) Light
c)
Fishes d)
Aquatic plants
5. UV radiations bring about
a)
Skin cancer b) Mouth cancer
c)
Lung cancer d) Liver cancer
6. Which one is more toxic?
a)
Carbon b)
CO2
c)
CO d)
SO2
7. Soil salinity can be measured
by
a)
Conductivity meter b) Photometer
c)
Protometer d)
Potometer
8. Biodegradable pollutant
is
|
a)
Plastic
|
b) Asbestos
|
|
c)
Sewage
9.
Lead is
|
d) Mercury
|
|
a)
Air pollutant
|
b) Soil
pollutant
|
c)
Radioactive pollutant d) Noise pollutant
11.
Air pollution is not caused
by
a)
Pollen grains
b)
Hydroelectric power
c)
Industries and automobiles
12.
CO is harmful for humans as
it
a)
Is carcinogenic
b)
Is antogonistic to CO2
c)
Has high affinity for
heamoglobin than oxygen
d)
Is destructive of O3
13.
Disease caused by eating
fish in water contaminated with industrial waste having mercury
a)
Minamat disease b) Brights dieses
c)
Hashmitos disease d) Arthritis
14.
Drawbacks of DTT as
pesticide is
a)
It becomes ineffective
after some time
b)
It is less effective that
others
c)
It is not easily degrades
in nature
d)
its high cost
15.
Fish die in water bodies
polluted by sewage due to
a)
Pathogens
b)
Clogging of gills by silt
c)
Reduction in oxygen
d)
Foul smell
16.
Drained sewage has BOD
a)
More than that of water
b)
Less than that of
water
c)
Equal to that of water
d)
None of the above
17.
Which one of the following
forms a toxic substance by combining with hemoglobin in blood.
a) CO2 b) CO
c)
O2 d)
CH4
18.
UV radiation from the sun
causes a reaction that produces
a) Flourides b)
CO
c)
SO2 d) O3
19.
The half of the atmosphere
is concentrated in the lower ………km
a)
3.5 km b)
4.5 km
c)
5.6 km d)
10 km
20.
Acid rain is due to
increase ion atmospheric concentration of
a)
Ozone and dust b) CO2 and CO
b)
SO3 and CO d) SO2
and NO2
21.
Detergents are sodium salts
of
a)
Calcium suphonates
b)
Barium sulphonates
c)
Sodium carbonates
d)
Benzene sulphonates
22.
BOD is the amount of
a)
Carbon dissoved in water
b)
Amount of oxygen in water
c)
Amount of bacteria in water
d)
All of the above
23.
The oxygen demand in water
is determined by
a)
Disulphate ion b) Dichromate ion
c)
Bicarbonate ion d) Bidentate
ion
24.
Herbicides are used for
removal of
a)
Insects
b)
Fungus on the plants
c)
Undesited plants
d)
Rodents
25.
DDT is one of the most
powerful
|
a)
Insecticide
|
|
b) Herbicides
|
|
c)
Fugicied
|
|
d) Pastecide
|
26.
Most hazardous metal
pollutant of automobiles exhaust is
a)
Mercury b)
Cadmium
c)
Lead d)
Copper
27.
Photochemical smog is
related to pollution of
a)
Air b) Water
c)
Soil d)
Nostic
28.
Environmental pollution
affects
a)
Biotic components
b)
Plants only
c)
Man only
d)
Biotic and abiotic
components of
environment
29.
Ozone hole refers to
a)
Hole in ozone layer
b)
Reduction in thickness of
ozone layer in stratosphere
c)
Reduction of thickness of
ozone layer in troposphere
d)
Increase concentration of
ozone
30.
Eutrophication causes
reduction in
a)
Dissolved hydrogen b)
Dissolved oxygen
c)
Dissolved salts d) All of the
above
31.
The yellow color in
photochemical smog is due to presence
of_____
a)
Carbon dioxide b) Nitrogen dioxide
c)
Chlorine gas d) None
32.
Which one of the following
makes the bulk of hydrosphere’s content?
a)
Oceans
b)
Glaciers & ice
c)
Fresh water lakes and ponds
d)
All have equal distribution
32.
Chlorination of water may
be harmful if the water contains_______
a) Ammonia b)
Dissolved oxygen
c)
Carbon dioxide d) All
33.
Which substance can be used
for disinfection water?
a) KMnO4 b)
Alums
c)
Ozone d)
All
34.
Which statement is wrong?
a) The amount of ozone layer is greater in the region close to the equator.
b) Ozone acts as filter for UV radiations
c) In the polar region, it acts as pollutant
d) CFCs play effective role in removing O3 in the stratosphere.
35.
Which of the following
factors help to measure quality of
water?
a) DO b) BOD
c)
COD d)
All of the above
36.
In the purification of
portable water, the coagulant used
is_________
a) Alum b) Nickel sulphate
c)
Copper sulphate d) Barium sulphate
37.
Newspaper can be recycled
again and again how many times?
a) 2 b)
3
c) 4 d)
5
38.
The main pollutant of
leather tanneries in the waste water
is_______
a) Chromium III b) Chromium II
c)
Sodium d)
Copper
39.
Which of the following air
pollutants is quiet killer?
a) CO2 b)
CO
c) NO2 d)
N2O4
40.
The outer part of the earth
is present in
a) Lithosphere b) Hydrosphere
c)
Biosphere d)
Atmosphere
41.
The components of
lithosphere are
a) Soil
b) Mineral of earth crust
c) Organic matter of earth crust
d) All of these
42.
The envelop of gases
surrounding the earth’s surface which absorb most of the cosmic rays and
maintain the balance is
a) Atmosphere b) Bio sphere
c)
Hydrosphere d) Lithosphere
43.
Ozone is located in
a) Troposphere b) Stratosphere
c)
Mesosphere d) Thermosphere
44.
Which fuel on combustion
produces fumigative and sulphurous emission?
a) Coal b) Gasoline
c) Kerosene oil d) Diesel and
furnace oil
45.
The solid or liquid particles
with diameter ranges from 0.01μ or less up to about 100 μ are
a) Aerosols b)
Dust
c)
Smoke d)
All of these
46.
The pollutants responsible
for eye, nose, throat, bronchial tract and respiratory tract irritation
are
a) H2S b) CO2
c)
NH3 d) Both a & c
47.
The air pollutant which is
responsible for corrosion and erosion is
a) SO2 b)
Carbon
c)
Smoke d)
Aerosol
48.
Carbon and soot accelerate
the corrosion and erosion due to
a) Acidic nature
b) Basic nature
c) Absorption or adsorption of the gaseous pollutant upon these
particulars mater d) All of these
49.
The pollutant which adhere
to stones bricks and surface and cause fouling are
a) Smoke and dust
b) Smoke and aerosols
c) Aerosols and dust
d) None of these
50.
Clean rain is
a) Basic b)
Slightly basic
c)
Slightly acidic d) All of these
51.
The PH of neutral rain
water is
a) 5.6 b) 4.6
c)
3.6 d)
2.6
52.
The pollutant which play an
important role in smog formation
a) CO b) NH3
c) H2S d)
All of these
53.
Photochemical smog is
a) Oxidizing smog b)
Reducing smog
c)
Neutral smog d) Smoke
54.
Reducing smog is formed by
the combination of
a) Smoke b)
Fog
c)
Dust d)
Smoke & fog
55.
The pollutant which results
into ozone depletion is
a) CO b) NH3
c) H2S d)
Freon
56.
The photochemical smog is
also called oxidizing smog which has high content of oxidant like
a) O3 b)
SO2
c)
NH3 d) All of these
57.
Presence of heavy metals in
water causes
a) Mental retardation b) Nervous disorder
c)
Cancer d)
All of these
58.
Industrial waste water
contains
a) Occluded & dissolved gases
b) Inorganic salts & organic compounds
c) Pathogens
d) All of these
59.
Drinking water should have
a) Turbidity less than 10ppm
b) pH between 7 to 8.5
c) should be free from diseases causing bacteria
d) all of these
60.
The concentration of
dissolved molecular oxygen in pure drinking water is
a) 2 to 4ppm b)
3 to 4ppm
c) 4
to 8ppm d)
8 to 10ppm
61.
The content of DO in
polluted water is
a) Less than 4ppm b) 4ppm
c)
6ppm d)
8ppm
62.
The COD (Chemical Oxygen
Demand) of water can be determined directly by treating with
a) Dichromate ions b)
Chloride ions
c)
Oxide ions d)
None of these
63.
Water having high value of
COD means the water is
a) Pure b) Dust
c)
Aerosols d)
Effluent
64.
The techniques used to kill
pathogens present in drinking water are
a) Chlorination b) Ozone
c) UV
irradiation d) All of these
65.
Pathogens present in
polluted water can killed by chlorination but cannot remove
a) Viruses b)
Taste
c)
Odour d)
All of these
66.
The process in solid waste
is burnt at high temperature ranging from 900 to 1000oC
a) Chlorination b) Ozonation
c)
Incineration d) All of these
67.
The chief pollutant which
likely to deplete
ozone
layer is
a) SO2 b) NH3
c)
CO2 d) CF2Cl2
68.
Which one of the following
is not a component of environment?
a) Hydrosphere b) Lithosphere
c)
Biosphere d)
Stratosphere
69.
The yellow color in
photochemical smog is due
to
presence of _______
a) Carbon dioxide b)
Nitrogen dioxide
c)
Chlorine gas d) None
70.
Which statement is wrong?
a) The amount of ozone layer is greater in the region close to the equator.
b) Ozone acts as filter for UV radiations.
c) In the polar region, it acts as pollutants.
d) CFCs play effective role in removing O3 in the stratosphere.
71.
In the purification of
portable water, the
coagulant
used is _______
a) Alum b) Nickel Sulphate
c)
Copper sulphate d) Barium sulphate
72.
The pH range of acid rain
is
a) 5 – 7 b) 6 – 8
c)
6.5 – 7 d)
Less than 5
73.
The %age of SO2
from Volcanic eruption is
a) 47 b)
57
c)
67 d)
77
74.
Which layer consist of
thick layer of ozone?
a) Stratosphere b) Thermosphere
c)
Troposphere d) Mesosphere
75.
Main reason of acid rain
is
a) SO2 / CO2 b)
NO2 / P2O5
c)
SO2 / NO2 d)
All
76.
The thickness of ozone
layer is
a) 25 to 50 km b) 25 to 28km
c)
3 km only d) 1 km only
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